2 * This file is part of the libsigrok project.
4 * Copyright (C) 2010 Uwe Hermann <uwe@hermann-uwe.de>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
24 #include "libsigrok.h"
25 #include "libsigrok-internal.h"
27 /* Message logging helpers with subsystem-specific prefix string. */
28 #define LOG_PREFIX "strutil: "
29 #define sr_log(l, s, args...) sr_log(l, LOG_PREFIX s, ## args)
30 #define sr_spew(s, args...) sr_spew(LOG_PREFIX s, ## args)
31 #define sr_dbg(s, args...) sr_dbg(LOG_PREFIX s, ## args)
32 #define sr_info(s, args...) sr_info(LOG_PREFIX s, ## args)
33 #define sr_warn(s, args...) sr_warn(LOG_PREFIX s, ## args)
34 #define sr_err(s, args...) sr_err(LOG_PREFIX s, ## args)
39 * Helper functions for handling or converting libsigrok-related strings.
43 * @defgroup grp_strutil String utilities
45 * Helper functions for handling or converting libsigrok-related strings.
51 * Convert a numeric value value to its "natural" string representation
54 * E.g. a value of 3000000, with units set to "W", would be converted
55 * to "3 MW", 20000 to "20 kW", 31500 would become "31.5 kW".
57 * @param x The value to convert.
58 * @param unit The unit to append to the string, or NULL if the string
61 * @return A g_try_malloc()ed string representation of the samplerate value,
62 * or NULL upon errors. The caller is responsible to g_free() the
65 SR_API char *sr_si_string_u64(uint64_t x, const char *unit)
68 uint64_t quot, divisor[] = {
69 SR_HZ(1), SR_KHZ(1), SR_MHZ(1), SR_GHZ(1),
70 SR_GHZ(1000), SR_GHZ(1000 * 1000), SR_GHZ(1000 * 1000 * 1000),
72 const char *p, prefix[] = "\0kMGTPE";
73 char fmt[8], fract[20] = "", *f;
78 for (i = 0; (quot = x / divisor[i]) >= 1000; i++);
81 sprintf(fmt, ".%%0%dlu", i * 3);
82 f = fract + sprintf(fract, fmt, x % divisor[i]) - 1;
84 while (f >= fract && strchr("0.", *f))
90 return g_strdup_printf("%" PRIu64 "%s %.1s%s", quot, fract, p, unit);
94 * Convert a numeric samplerate value to its "natural" string representation.
96 * E.g. a value of 3000000 would be converted to "3 MHz", 20000 to "20 kHz",
97 * 31500 would become "31.5 kHz".
99 * @param samplerate The samplerate in Hz.
101 * @return A g_try_malloc()ed string representation of the samplerate value,
102 * or NULL upon errors. The caller is responsible to g_free() the
105 SR_API char *sr_samplerate_string(uint64_t samplerate)
107 return sr_si_string_u64(samplerate, "Hz");
111 * Convert a numeric frequency value to the "natural" string representation
114 * E.g. a value of 3000000 would be converted to "3 us", 20000 to "50 ms".
116 * @param frequency The frequency in Hz.
118 * @return A g_try_malloc()ed string representation of the frequency value,
119 * or NULL upon errors. The caller is responsible to g_free() the
122 SR_API char *sr_period_string(uint64_t frequency)
127 /* Allocate enough for a uint64_t as string + " ms". */
128 if (!(o = g_try_malloc0(30 + 1))) {
129 sr_err("%s: o malloc failed", __func__);
133 if (frequency >= SR_GHZ(1))
134 r = snprintf(o, 30, "%" PRIu64 " ns", frequency / 1000000000);
135 else if (frequency >= SR_MHZ(1))
136 r = snprintf(o, 30, "%" PRIu64 " us", frequency / 1000000);
137 else if (frequency >= SR_KHZ(1))
138 r = snprintf(o, 30, "%" PRIu64 " ms", frequency / 1000);
140 r = snprintf(o, 30, "%" PRIu64 " s", frequency);
143 /* Something went wrong... */
152 * Convert a numeric voltage value to the "natural" string representation
153 * of its voltage value. The voltage is specified as a rational number's
154 * numerator and denominator.
156 * E.g. a value of 300000 would be converted to "300mV", 2 to "2V".
158 * @param v_p The voltage numerator.
159 * @param v_q The voltage denominator.
161 * @return A g_try_malloc()ed string representation of the voltage value,
162 * or NULL upon errors. The caller is responsible to g_free() the
165 SR_API char *sr_voltage_string(uint64_t v_p, uint64_t v_q)
170 if (!(o = g_try_malloc0(30 + 1))) {
171 sr_err("%s: o malloc failed", __func__);
176 r = snprintf(o, 30, "%" PRIu64 "mV", v_p);
178 r = snprintf(o, 30, "%" PRIu64 "V", v_p);
180 r = snprintf(o, 30, "%gV", (float)v_p / (float)v_q);
183 /* Something went wrong... */
192 * Parse a trigger specification string.
194 * @param sdi The device instance for which the trigger specification is
195 * intended. Must not be NULL. Also, sdi->driver and
196 * sdi->driver->info_get must not be NULL.
197 * @param triggerstring The string containing the trigger specification for
198 * one or more probes of this device. Entries for multiple probes are
199 * comma-separated. Triggers are specified in the form key=value,
200 * where the key is a probe number (or probe name) and the value is
201 * the requested trigger type. Valid trigger types currently
202 * include 'r' (rising edge), 'f' (falling edge), 'c' (any pin value
203 * change), '0' (low value), or '1' (high value).
204 * Example: "1=r,sck=f,miso=0,7=c"
206 * @return Pointer to a list of trigger types (strings), or NULL upon errors.
207 * The pointer list (if non-NULL) has as many entries as the
208 * respective device has probes (all physically available probes,
209 * not just enabled ones). Entries of the list which don't have
210 * a trigger value set in 'triggerstring' are NULL, the other entries
211 * contain the respective trigger type which is requested for the
212 * respective probe (e.g. "r", "c", and so on).
214 SR_API char **sr_parse_triggerstring(const struct sr_dev_inst *sdi,
215 const char *triggerstring)
219 struct sr_probe *probe;
220 int max_probes, probenum, i;
221 char **tokens, **triggerlist, *trigger, *tc;
222 const char *trigger_types;
225 max_probes = g_slist_length(sdi->probes);
228 if (!(triggerlist = g_try_malloc0(max_probes * sizeof(char *)))) {
229 sr_err("%s: triggerlist malloc failed", __func__);
233 if (sdi->driver->config_list(SR_CONF_TRIGGER_TYPE,
234 &gvar, sdi, NULL) != SR_OK) {
235 sr_err("%s: Device doesn't support any triggers.", __func__);
238 trigger_types = g_variant_get_string(gvar, NULL);
240 tokens = g_strsplit(triggerstring, ",", max_probes);
241 for (i = 0; tokens[i]; i++) {
243 for (l = sdi->probes; l; l = l->next) {
244 probe = (struct sr_probe *)l->data;
246 && !strncmp(probe->name, tokens[i],
247 strlen(probe->name))) {
248 probenum = probe->index;
253 if (probenum < 0 || probenum >= max_probes) {
254 sr_err("Invalid probe.");
259 if ((trigger = strchr(tokens[i], '='))) {
260 for (tc = ++trigger; *tc; tc++) {
261 if (strchr(trigger_types, *tc) == NULL) {
262 sr_err("Unsupported trigger "
269 triggerlist[probenum] = g_strdup(trigger);
273 g_variant_unref(gvar);
276 for (i = 0; i < max_probes; i++)
277 g_free(triggerlist[i]);
286 * Convert a "natural" string representation of a size value to uint64_t.
288 * E.g. a value of "3k" or "3 K" would be converted to 3000, a value
289 * of "15M" would be converted to 15000000.
291 * Value representations other than decimal (such as hex or octal) are not
292 * supported. Only 'k' (kilo), 'm' (mega), 'g' (giga) suffixes are supported.
293 * Spaces (but not other whitespace) between value and suffix are allowed.
295 * @param sizestring A string containing a (decimal) size value.
296 * @param size Pointer to uint64_t which will contain the string's size value.
298 * @return SR_OK upon success, SR_ERR upon errors.
300 SR_API int sr_parse_sizestring(const char *sizestring, uint64_t *size)
302 int multiplier, done;
305 *size = strtoull(sizestring, &s, 10);
308 while (s && *s && multiplier == 0 && !done) {
314 multiplier = SR_KHZ(1);
318 multiplier = SR_MHZ(1);
322 multiplier = SR_GHZ(1);
333 if (*s && strcasecmp(s, "Hz"))
340 * Convert a "natural" string representation of a time value to an
341 * uint64_t value in milliseconds.
343 * E.g. a value of "3s" or "3 s" would be converted to 3000, a value
344 * of "15ms" would be converted to 15.
346 * Value representations other than decimal (such as hex or octal) are not
347 * supported. Only lower-case "s" and "ms" time suffixes are supported.
348 * Spaces (but not other whitespace) between value and suffix are allowed.
350 * @param timestring A string containing a (decimal) time value.
351 * @return The string's time value as uint64_t, in milliseconds.
353 * @todo Add support for "m" (minutes) and others.
354 * @todo Add support for picoseconds?
355 * @todo Allow both lower-case and upper-case? If no, document it.
357 SR_API uint64_t sr_parse_timestring(const char *timestring)
362 /* TODO: Error handling, logging. */
364 time_msec = strtoull(timestring, &s, 10);
365 if (time_msec == 0 && s == timestring)
373 else if (!strcmp(s, "ms"))
382 SR_API gboolean sr_parse_boolstring(const char *boolstr)
387 if (!g_ascii_strncasecmp(boolstr, "true", 4) ||
388 !g_ascii_strncasecmp(boolstr, "yes", 3) ||
389 !g_ascii_strncasecmp(boolstr, "on", 2) ||
390 !g_ascii_strncasecmp(boolstr, "1", 1))
396 SR_API int sr_parse_period(const char *periodstr, uint64_t *p, uint64_t *q)
400 *p = strtoull(periodstr, &s, 10);
401 if (*p == 0 && s == periodstr)
402 /* No digits found. */
408 if (!strcmp(s, "fs"))
409 *q = 1000000000000000ULL;
410 else if (!strcmp(s, "ps"))
411 *q = 1000000000000ULL;
412 else if (!strcmp(s, "ns"))
414 else if (!strcmp(s, "us"))
416 else if (!strcmp(s, "ms"))
418 else if (!strcmp(s, "s"))
421 /* Must have a time suffix. */
429 SR_API int sr_parse_voltage(const char *voltstr, uint64_t *p, uint64_t *q)
433 *p = strtoull(voltstr, &s, 10);
434 if (*p == 0 && s == voltstr)
435 /* No digits found. */
441 if (!strcasecmp(s, "mv"))
443 else if (!strcasecmp(s, "v"))
446 /* Must have a base suffix. */